Preliminary results from the field experiment to determine the performance of preservative treated hardwoods with particular reference to soft rot. The four reference timber
IRG/WP 3164
J F Levy, D J Dickinson
The results given in the Tables 1-4 each refer to one of the four reference species treated with four solution concentrations of CCA as recorded from each test site. The species are: Alstonia scholaris, Betula pendula, Fagus sylvatica, Pinus sylvestris. The treatments were: Untreated, 0.66% CCA, 1.53% CCA, 3.01% CCA, 5.60% CCA. Each figure is an average of the ratings recorded for each replicate of the species at a particular treatment and a particular inspection. The agreed ratings were: Sound - no attack (Condition): 0 (Rating); Slight and superficial decay (attack): 1; Evident but moderate decay (attack): 2; Severe decay (attack): 3; Failure - almost complete loss of strength: 4. Detailed instructions were set out in the IRG Document No: IRG/WP/367 of 1976.